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Variable rate chemical management for agricultural landscapes

Active Publication Date: 2010-09-02
KYLE H HOLLAND TRUSTEE OF THE MARANATHA TRUST DATED JULY 30 2013
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]Therefore, it is a primary object, feature, or advantage of the present invention to improve over the state of the art.
[0006]It is a further object, feature, or advantage of the present invention to provide for methods and systems for application of agrochemicals which use real-time sensors to assist in the application of the agrochemicals.
[0007]It is a still further object, feature, or advantage of the present invention to provide for methods and systems for application of agrochemicals which do not require the use of crop reference strips or regions for calibration purposes.
[0008]Another object, feature, or advantage of the present invention is to provide for methods and systems for applications of agrochemicals which allow for users to select the methodology or algorithms to be used.
[0009]Yet another object, feature, or advantage of the present invention is to allow a crop producer to variably control rate of application of agrochemicals without driving through at least a portion of the field for calibration purposes.
[0010]A still further object, feature, or advantage of the present invention is to use adaptive algorithms for variably controlling the rate of application of agrochemicals within a field.

Problems solved by technology

Yet such calibrations may be inconvenient to provide and crop producers may not be willing to perform the steps needed to calibrate.

Method used

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  • Variable rate chemical management for agricultural landscapes
  • Variable rate chemical management for agricultural landscapes
  • Variable rate chemical management for agricultural landscapes

Examples

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example 1

[0084]A grower decides to variably apply nitrogen to a field. He decides to apply 100 kg / ha on average and that his maximum and minimum rates should be 50 and 150 kg / ha, respectively. These parameters are loaded into the variable rate controller located inside his tractor. Next, the grower drives several transect through his field to collect crop growth information, see FIG. 5. Note, the coefficients in equation 1 become: SApp equal 100 kg / ha, G equal 50 kg / ha, k equal 1.0 and for simplicity function ƒ(α) is the function argument α, equation 2, (normally ƒ(α) would be a curvilinear function that would characterize the growth behavior of the crop). The parameters for the variable α are determined via the transects through the field and will be bounded so as to produce a range of values between −0.5 and 0.5 around the field average. Equation 1 is now has the following form:

SRate=100+50·α  (6)

He then proceeds to drive the field and apply nitrogen to his crop. At the sensing extremes, t...

example 2

[0085]Now consider the previous example but this time allowance for real-time zone factor adjustment of the application rate is performed with the use of a soil sensor 50 in FIG. 6. The VRA system is driven through the as was done in example 1 above in order to collect crop biomass information, see FIG. 7. After the crop data has been collected, VRA system changes to the application mode to apply material to the crop. Material application is now based on both crop sensor readings and soil sensor readings. In this example the soil sensor 50 is a reflectance sensor that produces an NDVI output that is proportional to soil color. The output of the soil sensor is fed into a look up table that will be used to generate values for the zone factor k. A typical look-up table may take on the form as shown in Table 4.

TABLE 4Real-time zone factor look-up tablebased on soil NDVI measurements.Soil NDVIZone Factor, k0 1.00.3 0.870.35 0.750.385 0.5NDVI > 0.410.25

A similar table can be created for a...

example 3

[0086]A grower decides to variably apply nitrogen to a field. His application system uses a generalized plant growth function that is parameterized in terms of sensor values and optimum nitrogen use and the system uses a growth stage appropriate plug value for an initial VIRef calibration. His application system also incorporates the use an auto steer system to guide his vehicle through the field. The auto steer system will cause the applicator to maintain optimal sensor position over the crop rows. He decides that the optimal N rate to apply is 150 kg / ha on and that his maximum and minimum rates should be 250 and 100 kg / ha, respectively. Since he has already applied 50 kg / ha at planting, he sets his optimal N rate to 100 kg / ha. These parameters are loaded into the variable rate controller located inside his tractor. Next, the grower drives into the field and the applicator system starts to apply N to his crops. The controller will continually search for a better VIRef value as he d...

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Abstract

An apparatus for applying agrochemicals within a geographical area includes a dispensing system configured for dispensing the agrochemicals and a variable rate controller operatively connected to the dispensing system and configured to control dispensement of agrochemicals from the dispensing system. The variable rate controller is programmed with an algorithm which uses a plant growth stage appropriate plug value for an initial calibration. A method for applying agrochemicals within a geographical area includes acquiring a growth stage appropriate plug value for an initial calibration, using the growth state appropriate plug value in the initial calibration, and applying agrochemicals to the geographical area according to the initial calibration.

Description

PRIORITY STATEMENT[0001]This application is a continuation-in-part of U.S. patent application Ser. No. 12 / 167,706, filed Jul. 3, 2008, which claims priority to U.S. Provisional Patent Application No. 60 / 958,330, filed Jul. 3, 2007, both of which are hereby incorporated by reference in their entireties. U.S. patent application Ser. No. 12 / 167,706, filed Jul. 3, 2008 also claims priority to U.S. Provisional Patent Application No. 61 / 292,514, filed Jan. 6, 2010, hereby incorporated by reference in its entirety.FIELD OF THE INVENTION[0002]The present invention relates to variable rate chemical management for agricultural landscapes. More particularly, but not exclusively, the present invention relates to real-time sensor based application of agrochemicals.BACKGROUND OF THE ART[0003]Various methodologies are available to crop producers which allow them to apply agrochemicals. Some methodologies use real-time active crop sensors for variable rate control of agrochemicals. In a conventiona...

Claims

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Application Information

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IPC IPC(8): G06F17/00G06F19/00A01C23/00G01S19/42G06F3/048G01M99/00
CPCA01C21/002A01B79/005
Inventor HOLLAND, KYLE H.
Owner KYLE H HOLLAND TRUSTEE OF THE MARANATHA TRUST DATED JULY 30 2013
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